Improvement in hoppers for grinding-mills



G. S. THOMPSON.

Hoppers for Grinding Mills.

NO. 138,212, PaientedApril22,i873.

WETNEEEES.

INVENTU Fli 4% dew 74W ail 5 1% y dzwwmwz/w' XMJMQ 7m AM,PHoTO-UTHOG/PAPH/C 60 MY i (Isaak/.16.? PRoccsii UNITED STATES PATENTQFFIOE.

GEORGE S. THOMPSON, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN HOPPERS FOR GRINDING-MILLS.

Specification forming part of Letters Patent No. 138,212, dated April22, 1873; application filed July 5, 1872.

To all whom it may concern:

Be it known that I, GEORGE S. THOMPSON, of the city and county ofPhiladelphia, and

, State of Pennsylvania, have invented an Im- 4 are sectioned elevationsof Fig. 2.

A, Fig. 1, is a grinding-mill, and B the hopper of the same. Its spoutO, or part which conveys the paint or other wet stuff to between thestones to be ground, (as shown in dotted lines,) is cylindrical orstraight on its exterior, and cone-shaped (or tapering) on its interior,the base of the cone being down, as shown at Figs. 2 3 4. Thecylindrical exterior permits the hopper to rise and lower by means ofthe lever D. The gradual widening of the conical interior prevents thepaint from obstructing and sticking, and feeds it easily and freely tothe stones.

I claim as my invention- The hopper B, in combination with the spout 0,having a cylindrical exterior and a tapering or conical interior, bothrising and lowering or adjustable together, substantially for thepurpose shown and described.

In testimony whereof I hereunto sign my name in presence of twosubscribing witnesses.

GEORGE S. THOMPSON.

Witnesses at signing:

Fnnnors D. PASTORIUS, THos. K. STERRETT.

